Lock



1929., E. N. JACOB! 1,738,105

LOCK

Filed Feb. 20, 1928 substantially as hereinafter Patented Dec. 3, 1929 UNITED STATES PATENT OFFICE EDWARD N. JACOBI, OF MILWAUKEE, WISCONSIN, LSBIGNOB '10 BRIGGS LID STD-L!- TON CORPORATION, 01' MILWAUKEE, WISCONSIN, A CORPORATION 01 nmwm noon:

Application filed February 20, 1928. Serial No. 255,817;

in the provision of an improved lock structure having means incorporated within the element actuating tail or cam member for moving the operating key outwardly of cylinder when the cylinder is rotated to its 15 normal locking position.

A further object of this invention resides in the provision of an improved lock assembly whereby the cylinder and tail or cam member are readily mounted in the casing by a common means. 1 b With the above and other objects in view which will appear as the description proceeds, my invention resides in the novel construction, combination and arrangement of parts described and more particularly defined by the ap ended claims, it being understood that such anges in the precise embodiment of the herein d sclosed invention ma be made as come within the scope of the claims.

In the accompanying drawing, I have illustrated one complete example of the physical embodiment of my invention constructed according to the best mode I have so far devised for the practical application of the princi les thereof, and in which:

igure 1 is a perspective view of the mner end of the lock cylinder and element actuating cam or cylinder and the key e ector and spring;

Figure 2 is a view, partly 1n section and partly in elevation, taken longitudinally through a lock assembly, the key being illustrated in ejected position;

Figure 3 is a view similar to Figure 1 illustratin g the key as enga ed WlthlIl the cyllnder against the spring of the 61801301; and

Figure 1 is a sectional view taken through Figure 3 on the plane of the line 4.--4.

Referring now more particularly to the accompanying drawing, in which like numerals designate hke parts throu hout the several views, 5 designates the shel casing or lockmg cylinder mounting head, which may be die cast or machined of brass or other material andin which a key actuated plug or c nder 6 is rotatably secured, the c linder tiemg connected with the mechanism to be looked through a tail or cam member 7, to be later described. The casing 5 is centrally bored and has an annular recess or channel 8 spaced slightly inwardly of its outer end 9 to provide an annular flange 10 against which the forward ends of a pluralit of ears or lugs 11 on a steel cap 12, to be ater described, abut.

The wall of the casing bore is slotted, as at 13, 13' 14 and 14, to correspond with the lugs 11, the grooves or slots 13 and 14 cooperating with the tumblers 15 of the cylinder 6 to secure the cylinder against rotation except by a proper key 16, as described at len h in my copendin'g application, Serial 0.

155,627, filed December 18, 1926.

The medial portion of the cylinder 6 is of a diameter to e rotatably received between the lugs 17, on the inner wall of the shell and defined by the grooves 13, 13, 14 and 14, channel 8 and a channel 18 adjacent the rear end of the casin the outer end 19 of the c linder bein re need in diameter to receive t e cap 12, t e lugs of which engage in recesses or notches 20 formed in the shoulder at the inner end of said reduced portion. The lugs 11 engaging the flange 9 prevent the movement of the cylinder outwardly of the casing at its forward end and the tail piece 7 which is rotatably secured in the casing abutting the end of the cylinder, in the manner to be later described, prevents the movement of the cylinder rearwardly thus securing it within the casing.

A boss or enlargement 21 proy'fcts laterally from the inner end of the cy 'nder 6 to a depthless than the depth of the grooves 13, 13, 14 and 14: and coo crates with stops 22 to limit the rotation o the cylinder within the casing. The stops 22 are preferably in the form of lugs of a width equal to the adjacent lugs 17 to permit the insertion of the en of the tail piece at opposite sides of its shown,

cylinder, with the cap attached, from the rear.

e tail piece 7 is or approximate cylindrical shape havin an annular flange 23 on its inner end which fits within the counterbored portion 24 at the rear of the casing, there being a groove or channel 25 -.in the casin counterbore to receive a retaining ring or 0 ,er fastening 26 which engages the flange 23 of-the tail piece to thus secure it and the 'cylinderin the casing. The tail piece'and cylinder are connected for 'oint rotation bya air of lugs 27 projecte from the inner re. 28 and engaged within complementary recesses 29 in the inner end of the cylinder 6, whereby rotation of the cylinder likewise ro-. tates the tail piece and the mechanism, not

connected with the eccentric 30. Diametrically opposed channels or'slots 31 are formed in the wall of the tail piece, bore 28 to guide the side arms 32 of a substantially Y-shaped ejector member 33, the leg 34 of the e'ector having its end 35 slightly grooved and eing projectible into the cylinderkey slot 36. An expansile spring 37 is confined within the bore 28 of the tail piece with its outer end between the arms 32 of the ejector so that the same is at all times yieldably urged to its position illustrated in igure 2, the arms 32 being slidable into grooves 38 in the cylinder which form continuations of the grooves 31. a v I The ejector is normally in its position illustrated in Figure 2 and when it is desired to manipulate the cylinder to unlocked position, ey 16 is inserted in the slot 36, the tip thereof engaging in The key is then moved against the spring 37 to retract the tumblers, as illustrated in Figure 3, and frees the cylinder for rotation to unlocked position. The tumblers being in their retracted position and held against extension by the walls of the casing after the cylinder has been rotated'to disali n'theni from the grooves 13 and 14 that areo a width to permit movement of the tumblers therein,

prevent movement ofthe key outwardly and m Figure 3.

maintain the ejector in'its position illustrated However, when the cylinder is rotated to its locked position the pressure exerted on the .ke by the ejector, causes the key to be ejected in the manner illustrated'in Figure 2 inasmuch as the tumblers are free to move into the grooves 13 and 14. In this manner the absent-minded leaving of the key within the look after ithas been moved locked position'is re'vented.

Improper assemblin Smoot sliding of the ejector within its 'rooves'is' assured by the guiding action of t heikey inner end. engaging the notch 35 which .prevents crossing of the ejector, and its consequent binding in the grooves 31. Y of the tail piece withv respect to the cylin or is prevented by the,

the end 35 of the ejector.

lugs 27 which fit the racemes 29 of the cylinder only when properly aligned.

From the fore ing description taken in connection with t e accompan ing drawing, it will be readily apparent to those skilled 1n the art to,which an invention of the character described appertains that I rovide a novel and improved structurewhic is capable of ready assembly and which insures the smooth and' ready ejection of the key turned thereby to its normai tion. V c

What I claim as my invention is:

' 1. In a lock device including a cylinder mountin head, a cylinder rotatable within the head aving a key receiving opening and tumblers carried by the cylinder and normally locking the same in one position a ainst rotation, said tumblers being operable y the insertion of a proper key in the cylinder opening to free the cylinder for rotation from its locked position, a tail piece connected with the cylinder for rotation therewith and having a central bore provided with diametrically opposed longitudinal grooves, a member guided in the grooves of the tail piece, an extension carried by said member and adapted to project into the key opening of the cylinder from the rear, and spring means within the bore of the tail piece and yieldably urging the member guided therein to position its extension into .the key receiving opening, said extension being engaged by the inner end of a key inserted in the cylinder openingand moved into the tail piece against its spring to free the cylinder for rotation from its locked position, into the key opening as the cylinder is returned to its locked position to eject the key from the cylinder opening.

locking 'posi- 2. In a lock device including a cylinder.

mounting head, a cylinder rotatable within the head and having a key receiving opening and tumblers carried by the cylinder and normally locking the same in one position against rotation, said tumblers being operable by the insertion of a proper key in the cylinder opening to free the cylinder for rotation from its locked position, a tail piece connected with the cylinder for rotation therewith and having a central bore and longitudinal grooves communicating therewith, an ejector-member slidably guided in said longitudinal grooves, and spring means in the tail piece bore normally urging the ejector' member outwardly of the tail piece into the cylinder opening, said ejector member being movable against its spring by the end of a key'inserted in the cylinder opening whereby the key is normally urged outwardly of .the opening when the cylinder is in locked position, the inner end of the ejector member being notched to receive the inner end of the key which assists in guiding the ejector memas the lock is said member moving tid her in the tail piece and prevents its being crossed therein.

3. In a lock device including a casing, a cylinder rotatable within the casin and having a key receiving opening an tumblers carried by the cylinder to normally lock the same in the casing against rotation, said tumblers being 0 erable by the insertion of a proper key in t e cylinder opening to permit rotation of the cylinder, a tail plece having a flange on its inner end of a diameter to be received in the casing from the rear to abut the cylinder inner end, a spring ring engageable in a groove in the casing rearwardly of said tail piece flange to secure the same within the casing, and an operative Eonnection between the tail piece and cylin- 4:. In a lock device including a casing, a cylinder rotatable within the casing and having a key receiving opening and tumblers carried by the cylinder to normally lock the same in the casing against rotation, said tumblers being operable by the insertion of a proper key in the cylinder opening to permit rotation of the cylinder, a tail piece having a flange on its inner end of a diameter to be received in the casing from the rear to abut the cylinder inner end, a spring ring engageable in a groove in the casing rearwardly of the tail piece flange to secure the same Within the casing, an operative connection between the tail piece and cylinder, and a key ejector guided in the tail piece and the inner end of the cylinder to extend into the cylinder key receiving opening whereby the insertion of a key in the cylinder is at all times yieldably resisted.

5. In a lock device including a casing, a cylinder rotatable within the casing and having a key receiving opening and tumblers carried by the cylinder to normally look the same in thecasing against rotation, said tumblers being operable by the insertion of a proper key in the'cylinder opening to permit rotation of the cylinder, a tailpiece having a flange onits inner end of a diameter to be received in the casing from the rear to abut the cylinder inner end, a spring ring cngageable in a groove in the casing rear- Wardly of the tail piece flange to secure the same within the casing, an operative connection between the tail piece and cylinder, a key ejector slidable within the tail piece, spring means normally urging the ejector to extend into the cylinder key receiving opening, and means carried by the ejector whereby a keyinserted in the cylinder opening assists in guiding the ejector to prevent its binding.

6. In a lock device including a cylinder mounting head, a cylinder rotatable with the head and having a key receiving opening and tumblers carried by the cylinder to normally lock the same in a predetermined position against rotation in the head, said tumblers being 0 erable by the insertion of a pro er key 1n t e cylinder opening to free the cy 'nder for rotation within the head, a lug carried by .the cylinder near one end, and a lug carried b the head and engageable by the cylinder ug to provide an angular stop for limiting the rotation of the cylinder.

7. A device of the character described, comprising a shell having a longitudinal bore therein, a flan e at the outer end portion of the shell extending into its bore, spaced longitudinally extending projections on the inner wall of the shell, the longitudinal grooves formed between said projections communi eating with an annular counterbore adjacent the flange, a tumbler cylinder adapted to be inserted in the shell from the rear end thereof to be rotatably mounted between said projections, lugs carried by the outer end portion of the cylinder and spaced apart to correspond with the intervals between the shell grooves, the lugs passing through the grooves when the cylinder is placed in the shell and rotating in the annular counterbore, said lugs and flange preventing outward movement of the cylinder in the shell, the rear end of one of the longitudinal projections of the shell extending beyond the others whereby to provide an angular stop, and a lug extended from the cylinders inner end and engageable with said angular stop to limit rotation of the cylinder within the head.

8. In a lock device including a cylinder mounting head, a cylinder rotatable within the head having a key receiving opening and tumblers normally locking the cylinder in one position against rotation, saidtumblers being operable by the insertion of a proper key in the cylinder opening to free the cylinder for rotation from its locked position, a tail piece having opposed longitudinal grooves, means non-rotatably connecting the tail piece with the cylinder, cooperating means between the mounting head and the tail piece for securing the same together and the cylinder against detachment within the mounting head, and a key ejector longitudinally movable in the tail piece longitudinal grooves and having a part normally yieldably urged into the key receiving opening of the cylinder.

9. In a lock device including a cylinder mounting head, a cylinder rotatable within the head having a key receiving opening terminating in diametrically opposed longitudinal grooves at its inner end, and tumblers normally locking the cylinder in one position against rotation, said tumblers being operable by the insertion of a proper key in the cylinder opening to free the cylinder for rotation from its locked position, a tail piece having a central bore provided with diametrically opposed longitudinal grooves, means non-rotatably connecting the tail piece 4' i memos and the cylinder with their grooves in alignaligned a flat rey ejector stamped from sheet ment,cooperat1ng means between the mount-- metal slidably mounted in the aligned longimg head and the tail piece for maintaining tudinalooves, means normally yieldably the connection between the tail piece and urging t key ejector into the longitudinal the cylinder, a key ejector shdably mounted grooves formed in the cylinder, and a spring in said aligned longitudinal grooves, and ring carried by the mounting head and enspring means within the bore of the tail piece gageable with the tail piece for securing all and yleldably urging the kc ejector into the of the parts in pro er assembled position. cylinder to eject the key rom its opening In testimony w ereof I hereunto ailix my m when the cylinder is rotated to its locked signature.

pos1t1on. v EDWARD N. J ACOBI.

10. In a lock device including a cylinder mounting head, a cylinder rotatable within the head having a key receiving opening 15 terminating in diametrically opposedlongiw tudinal slots at its inner end and tumblers normally locking the cylinder in one position against rotation, said tumblers being operable by the insertion of a proper key in the cylin- 2o der opening to free the cylinder for rotation from its locked position, a tail piece having a central recess and diametrically opposed longitudinal slots, means non-rotatably conmeeting the tail piece and the cylinder with 25 their slots in alignment, at key ejector stamped from sheet metal slidably received in the aligned longitudinal slots, and spring means in the tail piece recess and normally yieldably urging the key ejector into the cylinder. so 11. In a lock device including a cylinder mounting head, a cylinder rotatable within the head having a key receiving opening terminating in diametrically opposed longitudi-' nal slots at its inner end and tumblers noras mally locking the cylinder in one position against rotation, said tumblers being operable by the insertion of a proper key in the cylinder opening to free the cylinder for rotation from its locked position, a tail piece having 40 a central recess and diametrically opposed m5 longitudinal slots, means non-rotatably connecting the tail piece and the cylinder with their slots in alignment, a key ejector stamped from sheet metal slidably received in the 45 aligned longitudinal slots, spring means in no the tail piece recess andv normally yieldably urging the key ejector into the cylinder, and means formed on the ejector engaging the spring means to insure proper coordinated on movement therebetween.

12. In a lock device including a cylinder mounting head, a cylinder rotatable within the head having a key receiving opening, diametrically opposed longitudinal grooves at 55 its inner end, and tumblers normally locking no the cylinder in one position against rotation, said tumblers being operable by the insertion of a proper key in thecylinder opening to free the cylinder for rotation 00 from its locked position, a tail piece having a central recess and diametrically opposed longitudinal slots extended from the recess, an interlocking connection between the cylin der and the tail iece'non-rotatably connect- 66 ing the same wit their longitudinal grooves 

